1961-1966 Ford F-250 Brake Master Cylinder – Castings 29780-C / 5472991
CRITICAL: Verify Specifications
Always verify the casting number and physical bore specifications on your original core before installation to ensure accurate fitment.
Product Specifications
- Bore Diameter: 1-1/8-inch bore size
- Application: Heavy-duty fleet and automotive vehicles
Verified Casting Numbers
- 29780-C
- 5472991
Application & Fitment Data
Model Years: 1961, 1962, 1963, 1964, 1965, 1966
Expert Installation & Field Note
Based on our shop experience specializing in heavy-duty brakes since 1985:
- Alignment: Ensure proper mounting and sealing surfaces before installation to prevent leaks and maintain hydraulic integrity. A misaligned pushrod restricts the piston from returning to its fully open “at rest” position, keeping the compensating ports closed and locking up the front brakes.
- Bench Bleeding: Always complete a thorough bench-bleeding routine until all air bubbles vanish completely from both ports prior to final vehicle assembly to protect your internal seals from running dry.



